Development Information

Hardware

For information about the KH-9xx hardware prerequisites and the Arduino shield, see Hardware

Software

We tried to keep the communication between the knitting machine/controller and the host computer as simple as possible. Information about the API and the communication can be found at Software. With this knowledge it should be easy for you to code your own AYAB client software.

Hardware emulation

To be able to develop a client-software without the access to a knitting machine and an AYAB Shield, there is the possibility of using this mode to mockup carriage operation only using your Arduino.

This mode is enabled by setting DBG_NOMACHINE to 1 in the file settings.h

Additionally, you have to connect the following peripherals to your Arduino:


 5V   +-----+             
            |             
          +-+-+           
          |   |           
          |   | 10k       
          |   |           
          +-+-+           
            |             
Pin7  +-----+
            |            
            + +           
              |           
              +--+        
            + + Pushbutton
            |             
GND   +-----+

When this mode is enabled, pressing the button has the same effect as when the carriage reaches the end of a line. At the beginning of the operation, the button press intitializes the machine.

Carriage Lock?

Maybe your Carriage Lock gets lost, with this you may create your own.

Internal Connectors

KH-910 Internal Connectors

Very Important: You have to isolate the USB of the Arduino from the Power Connector to prevent short circuits!!

Pin Color Description
     
S1    
1 orange 16 V
2 black GND
3 black GND
4 red 5 V
     
S2    
1 green 16 V
2 blue 16V
3   solenoid
4   solenoid
5   solenoid
6   solenoid
7   solenoid
8   solenoid
9   solenoid
10   solenoid
     
S3    
1   solenoid
2   solenoid
3   solenoid
4   solenoid
5   solenoid
6   solenoid
7   solenoid
8   solenoid
     
S5    
1 white 5 V
2 black GND
3 - -
4 red V2 - Needle counter (right fast)
5 blue V1 - Needle counter (right slow)
6 green Belt shift signal
7 yellow GND (?)
8 black Hall sensor right
9 red Scanner clock
10 blue Scanner color (high: black, low: white)
     
S7    
1 red Hall sensor left
2 black GND
3 white 5 V

KH-930 Internal Connectors

Pin Color Description
S1    
1 orange >12 V (V_solenoid)
2 black GND
3 black GND
4 red 5 V (V_logic)
5 blue >10 V (V_help)
     
S2    
1 white 5 V
2 black GND
3 red Hall sensor left (EOL_left)
     
S3    
1 white V_logic
2 grey GND
3 brown V1
4 blue V2
5 green Belt shift signal
     
S4    
1   solenoid F
2   solenoid E
3   solenoid D
4   solenoid C
5   solenoid B
6   solenoid A
7   solenoid 9
8   solenoid 8
     
S5    
1   solenoid 7
2   solenoid 6
3   solenoid 5
4   solenoid 4
5   solenoid 3
6   solenoid 2
7   solenoid 1
8   solenoid 0
9   V_solenoid
10   V_solenoid
     
S6    
1 white 5 V
2 black GND
3 red Hall sensor right (EOL_right)

Serial Communication

115200 baud
Line Ending: \n\r (10 13)

Sequence Chart

Message identifier format

0b”ABrr CCCC”

A message source 0 = host 1 = hardware
B message type 0 = request 1 = confirm
r reserved    
CCCC message identifier    

Message definitions (API v5)

name source id parameters   length incl id description
reqStart host 0x01 0xaa 0xbb 0xcc aa = machine type (see below)
bb = startNeedle (Range: 0..198)
cc = stopNeedle (Range: 1..199)		 4 -
cnfStart hardware 0xC1 0x0a a = success (0 = false, 1 = true 2 -
reqLine hardware 0x82 0xaa aa = lineNumber (Range: 0..255 2 -
cnfLine host 0x42 0xaa 0xbb[24] 0xbb[..] 0xbb[0] 0xcc 0xdd aa = lineNumber (Range: 0..255
bb[] = binary pixel data
cc = flags (bit 0: lastLine
dd = CRC8 Checksum		 29 -
reqInfo host 0x03 -   1 -
cnfInfo hardware 0xC3 0xaa 0xbb 0xcc aa = Version identifier
bb = Major Version
cc = Minor Version		 4 -
indInit hardware 0x84 0x0a a = initialized (0,1) 2 -
             
debug hardware 0xFF debug_string   var -
ID Machine Type
   
0 undefined/none
1 KH-910, KH-950(i)
2 KH-900, KH-930, KH-965(i), CK-35
3 KH-270
255 Diagnostic Mode

Message definitions (API v4)

name source id parameters   length incl id description
reqStart host 0x01 0xaa 0xbb aa = startNeedle (Range: 0..198)
*bb = stopNeedle (Range: 1..199)		 3 -
cnfStart hardware 0xC1 0x0a a = success (0 = false, 1 = true) 2 -
reqLine hardware 0x82 0xaa aa = lineNumber (Range: 0..255) 2 -
cnfLine host 0x42 0xaa 0xbb[24] 0xbb[..] 0xbb[0] 0xcc 0xdd aa = lineNumber (Range: 0..255)
bb[] = binary pixel data
cc = flags (bit 0: lastLine)
dd = CRC8 Checksum		 29 -
reqInfo host 0x03 -   1 -
cnfInfo hardware 0xC3 0xaa 0xbb 0xcc aa = Version identifier
bb = Major Version
cc = Minor Version		 4 -
indInit hardware 0x84 0x0a a = initialized (0,1) 2 -
             
debug hardware 0xFF debug_string   var -

Message definitions (API v3)

name source id parameters   length incl id description
reqStart host 0x01 0xaa 0xbb aa = startNeedle (Range: 0..198)
bb = stopNeedle (Range: 1..199)		 3 -
cnfStart hardware 0xC1 0x0a a = success (0 = false, 1 = true) 2 -
reqLine hardware 0x82 0xaa aa = lineNumber (Range: 0..255) 2 -
cnfLine host 0x42 0xaa 0xbb[24] 0xbb[..] 0xbb[0] 0xcc 0xdd aa = lineNumber (Range: 0..255)
bb[] = binary pixel data
cc = flags (bit 0: lastLine)
*dd = CRC8 Checksum//		 29 -
reqInfo host 0x03 -   1 -
cnfInfo hardware 0xC3 0xaa aa = Version identifier 2 -
debug hardware 0xFF debug_string   var -